I feel like both of those things have very clear advantages (ie, paper maps are large and cumbersome, I can store much more data on a server, I don't want to br

I feel like both of those things have very clear advantages (ie, paper maps are large and cumbersome, I can store much more data on a server, I don't want to bring a boombox on the subway). I'm all for people doing what they want as long as it's not extremely selfish, but I cannot myself see a clear advantage to a magnet implant, other than: A. Party tricks B. Telling people I have a magnet in my finger I think it probably comes from a wish for ill-thought out sci-fi tropes with the less than adequate technology at hand.